2
-1
Section::::Abstract.
Number
21690
2
-1
Section::::History.

Beaufort scale
155110
2
-1
Section::::Measurement.

Wind
15440316
Two
-1
Section::::History.:Infinity and infinitesimals.

Number
21690
Two
two
-1
Section::::History.:Rational numbers.

Number
21690
two
-1
Section::::Modern scale.

Beaufort scale
155110
two
-1
Section::::Abstract.
Wind
15440316